Non-throttling Y344 type fracturing set packer

Abstract

The invention discloses a non-throttling Y344 type fracturing set packer. The non-throttling Y344 type fracturing set packer comprises an upper connector, a rubber barrel, a slide block center pipe, a power slide block, a spring center pipe, a spring, a spring driving shell, a hydraulic cavity, an air cavity and a sealing ring. The inner diameter and the outer diameter of the sealed air cavity and the inner diameter and the outer diameter of the hydraulic cavity communicating with the center pipe are maintained to be the same so as to ensure that the area of the interaction force is the same. In the construction process, differential pressure exists between the air cavity and the hydraulic cavity and is a power source for achieving set packing of the rubber barrel. The set packing mode of the rubber barrel is only related to pressure inside a pipe column and not influenced by the differential pressure of the inside and the outside of the pipe column and the flow quantity and the flow velocity of liquid inside the pipe column, and set packing is achieved without sandblaster throttling. Therefore, the set packer can provide a possibility for large displacement sandblasting of the sandblaster. When the sandblasting amount of the maximum drift diameter of the set packer is achieved, due to the fact that the drift diameter is increased, the flow velocity of liquid containing sand inside a tool is decreased, and abrasion to an assembly in the pipe column is reduced; accordingly, the service lift of the tool is prolonged, the use security is improved, and the working efficiency and the construction quality are improved.

Description

technical field [0001] The invention relates to oil drilling mechanical equipment, in particular to a non-throttle setting Y344 fracturing packer. Background technique [0002] Since the reform and opening up, the national economy has grown rapidly, "scientific and technological innovation, independent innovation" has become the mainstream of domestic industrial development, and my country's industry is gradually developing in the direction of intensive, energy-saving, emission-reducing, and low-carbon. Petroleum is the "blood" and economic lifeline of my country's modern industrial development, and is an important strategic resource that affects the stability and security of national energy. In oil extraction, after long-term production of the oil well, the organic matter precipitation and sand production of the reservoir fluid will inevitably cause the blockage of the reservoir pores near the bottom of the well, resulting in a decrease in porosity and permeability, which w...

AI Technical Summary

Problems solved by technology

In the multi-layer fracturing string, the expansion type K344 packer is often used now, which is set by the hydraulic pressure difference between the construction string and the oil and casing. The disadvantage of this setting method is that the string needs to be formed. The internal and external pressure difference requires the sand blaster under the packer to throttle, which limits the sand blasting volume of the construction string, sacrifices construction efficiency, and aggravates the wear of the sand blaster orifice, increasing the load on the ground pumping equipment

At the same time, it is easy to cause unnecessary setting and friction damage due to pressure fluctuations in the well when the pipe string is lowered

In order to solve the above problems, the scientific and technological personnel of scientific research institutes continue to research and explore, and develop new packers. Although some progress has been made in technology, there are still technical problems that have not been overcome in practical application.

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